Headline

Senior Frontend Developer | React.js, Next.js & TypeScript | Performance & Accessibility | UX Focused

About

I'm a Senior Frontend Developer with 4.5+ years of experience building high-performance, accessible web applications. I specialize in React.js, Next.js, and TypeScript - with a focus on Core Web Vitals optimization, WCAG accessibility, and scalable architecture. At Publicis Sapient, I architect and deliver frontend solutions that balance performance and user experience. I've built everything from enterprise portals and real-time chat interfaces to optimized e-commerce applications. I'm experienced with modern tooling (Vite, TanStack Query, Shadcn UI) and love mentoring junior engineers. I'm actively exploring React 19 features, microfrontend architectures, and AI-driven UX patterns. Always looking to collaborate on projects that prioritize user experience and code quality. 🌐 Portfolio: https://sanjay-dev-beta.vercel.app </> GitHub: https://github.com/sanju1098

Location

Bengaluru

AI stack

antigravity

cursor

claudecode

Work experience

Senior Experience Engineer at Publicis Sapient, Sep 2025 - Present · 1 yr, Bengaluru, Karnataka, India

Senior Application Development Engineer at Russell Tobin, May 2025 - Sep 2025 · 5 mos, Bengaluru, Karnataka, India, • Architected a scalable Tech Events Portal for Morgan Stanley's Enterprise Technology and Services team using modular, accessible components with Shadcn UI and Tailwind CSS. • Engineered a multi-step event form with React Hook Form and Zod validation, implementing role-based access control and intelligent caching to reduce form errors and improve data integrity. • Optimized user workflows through advanced filtering, seamless third-party integrations, and leveraged GitHub Copilot to accelerate feature development while maintaining code quality standards.

Application Development Engineer at Unisys, Jun 2023 - Apr 2025 · 1 yr 11 mos, Bengaluru, Karnataka, India, • Designed and implemented responsive UI for IATA Airline Retailing Order View, optimizing page load times and ensuring seamless user experience across devices. • Built end-to-end order creation flows with React and TypeScript; optimized build pipeline with Vite.js, reducing deployment time and improving overall system efficiency. • Engineered a real-time Conversational Chat Interface with Next.js, delivering responsive interactions and improving user engagement in critical customer-facing workflows.

Frontend Developer at HSIPL - ChkdIn, Oct 2021 - Jun 2023 · 1 yr 9 mos, Bengaluru, Karnataka, India, • Developed reusable, production-grade UI components for VMware CSP Marketplace using React.js, TypeScript, HTML5, and CSS3, prioritizing performance, scalability, and maintainability. • Integrated VMware Clarity Design System components and documented them in Storybook, establishing design standards and improving accessibility across the application.

Intern Web Developer at Sixth Circle Technologies Pvt Ltd, Feb 2021 - Sep 2021 · 8 mos, Bengaluru, Karnataka, India, • Gained hands-on experience in React.js, Django, and Django Rest Framework, following industry best practices in full-stack development and clean code architecture. • Designed PostgreSQL schemas, developed backend logic for product and order management, and integrated responsive UI with tested APIs to enhance user experience and application stability.

Education

Bachelor of Engineering - BE, Computer Science Engineering, T John institute of technology

Pre University, PCME, vijaya pre university college

Public links

github: https://github.com/sanju1098